Carbureter.



J. N. PETERSEN & W. F. PETTIT.

OARBURETER. APPLICATION FILED NOV. 14, 1908'.

Patented Nov. 29, 1910.

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J. N. PETERSEN & W. F. PETTIT. CARBURETER. APPLIUATIONY FILED N0v.14, 1908.

976,91 1 Patented Nov. 29, 1910.

2 sums-SHEET 2.

I H WITNESSES FL INVENTORS UNITED STATES PATENT OFFICE.

JOHN N. PETERSEN AND WILLIAM F. PETTIT, OF NEW ORLEANS, LOUISIANA.

CARBUBETER.

Specification of Letters Patent.

Patented Nov. 29, 1910.

Application filed November 14, 1908. Serial No. 462,583.

To all whom it may concern:

Be it known that we, JOHN N. PETERSEN and WILLIAM F. PErTiT, citizens of the United States, and residents of the city of New Orleans, in the parish of Orleans and State of Louisiana, have invented a new and Improved Carburetor, of which the following is a full, clear, and exact description.

This invention relates to carbureters for use in connection with gasolene engines.

One objectof the invention is to provide a carbureter having a cup-shaped mixture valve, having a double flat seat whereby the air and gasolene are shut of? simultaneously, making it ideal for two-cycle engines, as no other check valve is needed.

A further object is to provide a carbureter in which the gasolene is spread out as it comes in contact with the under side of the mixture valve and is then passed through a series of compartments, where it mixeswith the air, and the whole mixture is united in one volume before passing into the engine.

A further object is to provide novel means for regulating the air and gasolene in correct proportions to each other, and varying the proportions to suit the requirement of any particular engine.

The invention consists in the construction and combination of parts, to be more fully described hereinafter and particularly set forth in the claims.

Reference is to be had to the drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures, and in which Figure 1 is a central vertical section through the carburetor, showing a straight connection at the top of the same; Fig. 2 is a central vertical section, taken at right angles to the section in Fig. 1, and showing the means for holding the air valve cup in position; Fig. 3 is a horizontal section, taken on the line 33 in Fig. 2; Fig. 4 is a horizontal section, taken on the line 4-4 in Fig. 1; Fig. 5 is a section taken on the line 5-5 in Fig. 1; and Fig. 6 is a side elevation, partly in section, of the carburetor, showing an angle connection at its upper end.

In said drawings, the body or valve casing 1 of the carbureter has an internal annular flange 2, about midway of its length, which is finished with a flat valve seat 3. The body of the carbureter is thereby divided into an upper chamber 5 and a lower chamber 6. Extending longitudinally in the interior of the carbureter body 1 are a plurality of longitudinal flanges 8 extending from the annular flange 2 upward to the top of said body and having at their bottoms where they join the annular flange 2, curved or flaring portions, as shown in Fig. 2. Said longitudinal flanges 8 are finished on their inner faces to fit the exterior of a mixture valve 9.

The mixture valve 9 comprises a cup having a flat bottom 10, adapted to rest upon the seat 3, said cup being provided with a plurality of drip holes 12 extending diagonally through the lower corner of the valve,

which enables any crude oil or water which mayv become condensed therein to drain away. Bearing against the bottom 10 is a spiral spring 14, said spring bearing at its upper end against the inside of a coupling 15, and lying within a notch 16 provided therefor in said coupling.

It will be seen that the longitudinal flanges 8, in connection with the mixture valve 9, divide the upper chamber 5 into four compartments 18. The number of the compartments may obviously be varied by varying the number of longitudinal flanges.

Extending across the inside of the body 1 is a web 20, having a central boss21 at its upper side, the upper surface of which is in line with the valve seat 3, and is therefore adapted to come in contact with the under side of the bottom 10 of the mixture valve 9. Said web is provided with a central vertical passage 22, which connects with a longitudinal passage 24, which is threaded for a portion of its length to receive the threaded stem 25 of the needle valve 26. Extending in line with the passage 24 is a passage 28, which is enlarged into a screwthreaded opening 29 for the reception of the gasolene supply pipe 30. A wall 31 extends between the passages 28 and 24, and is provided with a conical passage 32 for the reception of the end of the needle valve 26.

The body 1 is provided with a screwthreaded recess 35, adapted to receive a gland 36, which retains a packing washer 37, thereby forming a stuffing boxaround the stem of the needle valve 26. The outer end of the needle valve stem is formed into a pinion .40, having teeth 41, adapted to mesh with teeth 42 on a sector 43, which is slidably mounted in a slot 44 of the handle 45 of an air valve 46. v The sector 43 is screwthreaded at its lower end 47, to co-act with a thumbnut.- 48,. by =Wl11Clllt may befirmly clamped in position in the handle 45. y

In the periphery of the body 1, near its lower end, are a plurality of elongated holes or'ports. 50, adaptedto register With similar holes or ports 51, formedin the periphery of the vertical sides of the air valve 46.

- small. projections 58 formedon the upper side of the thumb nut 54, to preventthenut 54 from rattling loose through the -vibraetions caused bythe engine... By.,tightening;

the nut .54, the,degrQB-,-.0f .pressurelwith,

Which the air valve 46 is maintainedagai-nst the body, 1 may be .varied to prevent the. valve changing its. positionpn a counteof the vibrations ,of the engine. By grasping the handle 45, the airvalve 46.jmaybe rotated about the lower end of the body '1, thethumb nut 54 rotating therevvith about the threaded ends of the .wires- 52, since the projections .58 on said nut .lie vvithin. the recesses. 57 and thereby preventthe relative.

. rotation .of ,saidnutandairvalve, except Whenthev nut is 'turned manually. I It is only necessary to v. turn said handle for, a portion of a revolutionin order-Jo bring. the ports {50 and 5.1, into viullregistry The wires 52,, being ,retainedin the apertures .53 in the body 1, supportsaid air .valve.,

In. Fig. ,1, We have shown a coupling 15, 1 Which is screw-threaded ,to thenpper end of the carbureter. body. and ,adapted to .re

ceive a pipe having straight connection, andinF1g. 6, wehave shown an .angle connect ion- [60, Jtvhich .is screw threadedto the upper end. of the carbureter body v1, to merely. I show, the i varieties of connections Which ,may be fastened; to the .carbureter. 1 The operation I of the device is as .fol lows :Thesector 43, when. in its innermost position will cause ,the. rotation of the.

' needlevalvej 26 throughcotiperatiom with the pinion'.40..for only. about-a halt, turn, thus allovvingv a small amount of gasolene. to

pass ,into. the 'ca rbureter, through the centltal passage 22. By moving the sector 43 along.-

the handle 45,..the. extent,to which: theneedle-f valv e ...26 vvill be opened.+may. .be varied. l Whenthe sector isin itsoutermost position,=-. the needlevalvevvill beugiven a, full. turn,-

When the pinion 40 traverses the entire length of the rack upon the upper side of -the-sector. It Will be noted that the proportions of air and gasolene may be very accurately adjusted and this adjustment maintained throughout the running of the engine.

Byvarying the location of the sector-rack 43 along the handle 45, the extent of the arc traversed by the pinion 41 will be varied accordingly, dependingupon the distance of said rack fromeits center of rotation, and also the extent to which the handle 45 is rotated. The angular movement of the handle 45 is the samefor any given opening-v of the air-valve, but the length of the rack 43 will vary accordingto the distance of said rack from the'center of rotation. Thus, any proportion of air and gasolene may be supplied.

By the construction and arrangement shown, the proportion of air and gasolene is mechanically varied to be correct at all speeds. This variation of proportionwis predeterminedbytwo adjustments. In adjusting the carbureter the sector-rack 43 is removed from the handle, and the needle valve .and the air valve are set until the highest speed is attained and the positions of thevalves are noted. Both valves are then shut downuntil the slowestspeed is attained, and the rack is then secured at such point on the handle as will give the required travel of the needle valve between the exment is then correct for all speeds and is permanent.

The gasolene comingfrom the passage 22 comes-in contactwith the under sideof the mixturewalve 9, and.is thereby spread out in all directions, and passing between the mixture valve; 9 and its seat .entersthe combottom of the; bodypf the carbureterpasses around .the. ,web-QO and between the mixture partments 18, thereby. thoroughly mixing Withsthegasoleneo .During the compression of the gases in the engine,.or if forany other reason excessiveback pressure should occur, the valve 9 .Wlll bear simultaneously against the. seats 3. and 21, thereby simultaneously supply. This obviatesthe .use of anadditional. check valve. After the mixture rises above the top ,of the mixture valve 9, it unites etO form one,-volumeand then passes to the, engine.

.claim as netvand desire to secure by Letters Patent 1. carbureter comprising a valve casing having a substantially straight airvv passage therethrough, means for supplying gasolene arc traversedby the pinion 41 over the tremes of highand low speed. The adjust.

partments 18.- The..air comingin from thevalve and its seat, and also enters the com- Having thus described, our invention, We

shut-ting ,otl the 'air.;supply and thegasolene to said valve casing, means for supplying air thereto, a plurality of longitudinal flanges in said valve casing, means for controlling the supply of air and gasolene to said valve casing, a mixture valve mounted to slide in said valve casing and having its periphery in contact with the inner faces of said longitudinal flanges, and two valve seats to which the gasolene supply and the air supply respectively lead, the said seats being arranged to be simultaneously engaged by said mixture valve, to check the flow of air and gasolene.

2. A carbureter, comprising a valve casing having a central passage for the supply of gasolene thereto and apertures for admitting air thereto, a valve for controlling the supply of gasolene to said passage, an elongated pinion on the stem of said Valve, a cap rotatably mounted at the end of said valve casing and having apertures for admitting air, which cooperate with the apertures in said valve casing, a handle on said cap provided with a radial slot, a rack cooperating with said pinion mounted to slide on said handle and guided by said slot, and means whereby said rack may be secured in adjusted position.

3. A carbureter, comprising a valve casing having a central passage for the supply of gasolene thereto and apertures for admitting air thereto, a valve for controlling the supply of gasolene to said passage, an elongated pinion on the stem of said valve, a cap rotatably mounted at the end of said valve casing and having apertures cooperating with the apertures in said valve casing, for admitting air, a handle on said cap provided with a radial slot, a sector-shaped rack meshing with said pinion and mounted to slide on said handle while guided by said slot, means for securing said rack in ad justed position, and means for holding the said cap in rotatable relation with the end of said valve casing.

4:. A carbureter, comprising a valve casing having means for supplying gasolene thereto and apertures for admitting air thereto, a cap rotatably mounted on said valve casing, having apertures adapted to co-act with the apertures in said valve casing, and a central hole with communicating recesses, a pair of wires supported in said body and projecting through said hole, and a nut on said wires engaging the outside of said cap and having lugs adapted to enter said recesses.

5. A carbureter comprising a valve casing having means for supplying gasolene thereto, and apertures for admitting air thereto, a cap rotatably mounted on said casing and having apertures adapted to register with the apertures in the valve casing, the said cap having a central hole in its bottom, a pair of spring wires having hori zontal arms extending through apertures in the valve casing, and vertical arms brought together and screw threaded, the said vertical arms extending through the hole in the bottom of the cap, and a nut on said threaded arms and engaging the outside of said cap.

6. A carbureter, comprising a hollow body forming a valve casing, a needle valve for controlling the supply of gasolene to said valve casing, an elongated pinion on the stem of said'valve, an air valve-for supplying air to said valve casing, a handle on said air valve, a rack adjustable on said handle and along the elongated pinion and engaging the latter, and means for fastening said rack to the handle at a point where the movement of the latter will give the required travel of the needle valve between the extremes of high and low speed.

7. A carbureter, comprising a valve casing having apertures for admitting air thereto, a needle valve for controlling the supply of gasolene to said valve casing, an elongated pinion on the stem of said valve, a cap rotatably mounted at the end of said valve casing and having apertures for admitting air, the said apertures cooperating with the apertures in said valve casing, a handle on said cap, and a rack cooperating with said pinion and adjustable 011 said handle to a predetermined position relative to said pinion, and means for securing said rack in the predetermined position.

8. A carbureter comprising a valve casing, having a passage for the supply 01": gasolene thereto, and apertures for admitting air thereto, a needle valve for controlling the supply of gasolene to said passage, and having a stem projecting from the said valve casing, an elongated pinion on the projecting end of the valve stem, a cap rotatably mounted at the end of the valve casing and having apertures for admitting air the said apertures cooperating with the apertures in the valve casing, a handle projecting from the cap and extending below the said elongated pinion, the handle being provided with an elongated slot, a sector-shaped rack meshing with the under side of said pinion at a predetermined point, and having a depending member secured in said slot in the handle, and means for holding the cap in rotatable relation with the end of the valve casing.

9. A carbureter comprising a hollow body having an internal annular flange forming a valve seat and dividing the body into an upper and a lower chamber, a plurality of longitudinal flanges on the wall of said upper chamber, a mixture valve mounted to slide in said upper chamber and having its periphery in contact with the inner faces of said longitudinal flanges, the said flanges and mixture valve dividing the upper chamhere-into a plurality of compartments, a ceni In witness. WhGI'BQfr-We have signed our 10 tralfiab valve seat, a gasolenelsupply leading names "to this specification'in the presence to saidcentral vallve seat,-andn11)eansoradof tW0= subscribingwitnesses,

mittingiair ,to t e lower cham er, t e, sai v mixture valve icoiiperating :XVlth said valve? seats and the gasolene and airwhen the mix ture valve is lifted passing between the said, Witnesses mixture Nalve and the-lannularqvalve seat to P. F. BRINKMANN', said compartments. J. F. BATH. 

